Added overcommit. (#424)

.overcommit.yml

+# Use this file to configure the Overcommit hooks you wish to use. This will
+# extend the default configuration defined in:
+# https://github.com/brigade/overcommit/blob/master/config/default.yml
+#
+# At the topmost level of this YAML file is a key representing type of hook
+# being run (e.g. pre-commit, commit-msg, etc.). Within each type you can
+# customize each hook, such as whether to only run it on certain files (via
+# `include`), whether to only display output if it fails (via `quiet`), etc.
+#
+# For a complete list of hooks, see:
+# https://github.com/brigade/overcommit/tree/master/lib/overcommit/hook
+#
+# For a complete list of options that you can use to customize hooks, see:
+# https://github.com/brigade/overcommit#configuration
+#
+# Uncomment the following lines to make the configuration take effect.
+
+PreCommit:
+ RuboCop:
+   enabled: true
+   on_warn: fail # Treat all warnings as failures
+
+PrePush:
+  RSpec:
+     enabled: true
+     on_warn: fail # Treat all warnings as failures
+#
+#  TrailingWhitespace:
+#    enabled: true
+#    exclude:
+#      - '**/db/structure.sql' # Ignore trailing whitespace in generated files
+#
+#PostCheckout:
+#  ALL: # Special hook name that customizes all hooks of this type
+#    quiet: true # Change all post-checkout hooks to only display output on failure
+#
+#  IndexTags:
+#    enabled: true # Generate a tags file with `ctags` each time HEAD changes

Gemfile

@@ -23,6 +23,7 @@ group :development, :test do
   gem 'codeclimate-test-reporter'
   gem 'coveralls'
 
+  gem 'overcommit'
   gem 'ruby_dep', '1.3.1'
 
   platforms :mri, :mingw do